EP 0634666 A3 19970820 - Receiving device for receiving and demodulating spectral diffusion-modulated GPS wave.
Title (en)
Receiving device for receiving and demodulating spectral diffusion-modulated GPS wave.
Title (de)
Empfänger zum Empfangen und Demodulieren von spreizspektrummodulierten GPS-Signalen.
Title (fr)
Récepteur de réception et démodulation d'ondes GPS modulée à spectre étalé.
Publication
Application
Priority
- JP 26570493 A 19930929
- JP 18186093 A 19930628
Abstract (en)
[origin: EP0634666A2] A receiving device for receiving spread spectrum-modulated GPS signal transmitted from GPS (Global Positioning System) satellites to the earth. Received GPS signals are converted into IF signals which are despread-demodulated on the basis of C/A codes, resulting in demodulated PSK signals. Carriers are reproduced from the IF signals and a clock signal for C/A code generator is produced from the reproduced carrier and a local oscillation signal. The PSK signal is demodulated on the basis of a reference frequency of a PLL circuit to obtain a navigation message. With this construction, it is possible to stably receive GPS signals from a plurality of GPS satellites with suitable timing by using a simple circuit construction. <IMAGE>
IPC 1-7
IPC 8 full level
G01S 1/00 (2006.01)
CPC (source: EP US)
G01S 19/30 (2013.01 - EP US); G01S 19/243 (2013.01 - EP US)
Citation (search report)
- [X] EP 0496354 A2 19920729 - SONY CORP [JP]
- [A] EP 0351156 A1 19900117 - ASHTECH TELESIS INC [US]
- [A] US 5185610 A 19930209 - WARD PHILLIP W [US], et al
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0634666 A2 19950118; EP 0634666 A3 19970820; US 5402442 A 19950328
DOCDB simple family (application)
EP 94109715 A 19940623; US 26625394 A 19940627